The following information obtained from UNAVCO's online DOI system:
(https://www.unavco.org/data/doi/search/search.html)

Azerbaijan GPS Network - PIRG-Pirguly P.S.
Start: 24-Apr-2018
End: 01-Nov-2022
Kadirov, Fakhraddin, Mammadov, Samir, Safarov, Rafig, Reilinger, Robert E., 2018, Azerbaijan GPS Network - PIRG-Pirguly P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/SNJQ-3029